Question

Say I have this code in PHP :

$query = mysql_query("SELECT ...");

the statement returns a resource object. Normally it would get passed to mysql_fetch_array() or one of the mysql_fetch_* functions to populate the data set.

I’m wondering if the resouce object – the $query variable in this case can be cached in memcache and then a while later can be fetched and used just like the moment it’s created.

// cache it
$memcache->set('query', $query);

// restore it later
$query = $memcache->get('query');

// reuse it
while(mysql_fetch_array($query)) { ... }

I have googled the question, didn’t got much luck.

I’m asking this is because it looks way much light-weighted than the manner of “populate the result array first then cache”.

So is it possible?

Answer 1

I doubt it. From the serialize manual entry

serialize() handles all types, except the resource-type.

Edit: Resources are generally tied to the service that created them. I don’t know if memcached uses serialize however I’d guess it would be subject to the same limitations.